Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
■
the caller has dialed the IP address of the VCS directly
■
the caller has dialed a domain name belonging to the VCS (either one of its configured SIP domains, or any
domain that has an SRV record that points at the IP address of the VCS), without giving an alias as a prefix
domain that has an SRV record that points at the IP address of the VCS), without giving an alias as a prefix
Normally such calls would be disconnected. However, such calls will be routed to the Fallback alias if it is specified.
Note that some endpoints do not allow users to enter an alias and an IP address to which the call should be placed.
Note that some endpoints do not allow users to enter an alias and an IP address to which the call should be placed.
Example usage
You may want to configure your fallback alias to be that of your receptionist, so that all calls that do not specify an
alias are still answered personally and can then be redirected appropriately.
alias are still answered personally and can then be redirected appropriately.
For example, Example Inc has the domain of
example.com
. The endpoint at reception has the alias
reception@example.com
. They configure their VCS with a fallback alias of
reception@example.com
. This means that any
calls made directly to
example.com
(that is, without being prefixed by an alias), are forwarded to
reception@example.com
, where the receptionist can answer the call and direct it appropriately.
About Transforms and Search Rules
The VCS can be configured to use transforms and search rules as a part of its call routing process.
Transforms
Transforms are used to modify the alias in a search request if it matches certain criteria. You can transform an alias
by removing or replacing its prefix, suffix, or the entire string, and by the use of regular expressions.
by removing or replacing its prefix, suffix, or the entire string, and by the use of regular expressions.
This transformation can be applied to the alias at two points in the routing process: as a pre-search transform, and as
a zone transform.
a zone transform.
■
Pre-search transforms are applied before any Call Policy or User Policy are applied and before the search
process is performed (see
process is performed (see
for more details).
■
Zone transforms are applied during the search process by each individual search rule as required. After the
search rule has matched an alias they can be used to change the target alias before the search request is sent
to a target zone or policy service (see
search rule has matched an alias they can be used to change the target alias before the search request is sent
to a target zone or policy service (see
for more details).
Search rules
Search rules are used to route incoming search requests to the appropriate target zones (including the Local Zone) or
policy services.
policy services.
The VCS's search rules are highly configurable. You can:
■
define alias, IP address and pattern matches to filter searches to specific zones or policy services
■
define the priority (order) in which the rules are applied and stop applying any lower-priority search rules after
a match is found; this lets you reduce the potential number of search requests sent out, and speed up the
search process
a match is found; this lets you reduce the potential number of search requests sent out, and speed up the
search process
■
set up different rules according to the protocol (SIP or H.323) or the source of the query (such as the Local
Zone, or a specific zone or subzone)
Zone, or a specific zone or subzone)
■
limit the range of destinations or network services available to unauthenticated devices by making specific
search rules applicable to
search rules applicable to
only
■
use zone transforms to modify an alias before the query is sent to a target zone or policy service
Note that multiple search rules can refer to the same target zone or policy service. This means that you can specify
different sets of search criteria and zone transforms for each zone or policy service.
different sets of search criteria and zone transforms for each zone or policy service.
The VCS uses the protocol (SIP or H.323) of the incoming call when searching a zone for a given alias. If the search is
unsuccessful the VCS may then search the same zone again using the alternative protocol, depending on where the
search came from and the Interworking mode (Configuration > Protocols > Interworking):
unsuccessful the VCS may then search the same zone again using the alternative protocol, depending on where the
search came from and the Interworking mode (Configuration > Protocols > Interworking):
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Cisco TelePresence Video Communication Server Administrator Guide